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comment	@# @;


1.1
date	2025.02.17.22.00.48;	author nia;	state Exp;
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desc
@@


1.1
log
@libcaca: Update to 0.99.20

Special notes:
- building without imlib2 is broken upstream, remove the option.
- upstream switched to github.
- verified to build on freebsd, netbsd, linux, macos by drecklypkg CI.

Upstream changes:
- IPv6 support in cacaserver
- fixed a bug from 2004 that caused PDF documentation generation to
  fail
- memory allocation functions are now more robust
- numerous fixes for memory leaks and invalid memory accesses:
    CVE-2021-30498
    CVE-2021-30499
    CVE-2021-3410
    CVE-2018-20546
    CVE-2018-20547
    CVE-2018-20545
    CVE-2018-20548
    CVE-2018-20549
@
text
@$NetBSD$

[PATCH] Prevent a divide-by-zero by checking for a zero width or height.

https://github.com/cacalabs/libcaca/pull/66

--- src/img2txt.c.orig	2018-05-22 14:04:36.000000000 +0000
+++ src/img2txt.c
@@@@ -177,7 +177,13 @@@@ int main(int argc, char **argv)
     }
 
     /* Assume a 6×10 font */
-    if(!cols && !lines)
+    if(!i->w || !i->h)
+    {
+	fprintf(stderr, "%s: image size is 0\n", argv[0]);
+        lines = 0;
+	cols = 0;
+    }
+    else if(!cols && !lines)
     {
         cols = 60;
         lines = cols * i->h * font_width / i->w / font_height;
@@@@ -214,7 +220,7 @@@@ int main(int argc, char **argv)
     export = caca_export_canvas_to_memory(cv, format?format:"ansi", &len);
     if(!export)
     {
-        fprintf(stderr, "%s: Can't export to format '%s'\n", argv[0], format);
+        fprintf(stderr, "%s: Can't export to format '%s'\n", argv[0], format?format:"ansi");
     }
     else
     {
@